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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 An Effective Method to Synthesize a Metal oxide-Graphene Nanocomposite for Supercapacitor Application

2015년 9월 2일 14시 04분 32초
ELEC.P-550 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 16일 (금요일) 13:00~14:30
저자 및
장우리, 이연식, 구혜영1,*
전북대학교 화학공학부, Korea
1한국과학기술연구원(KIST) 전북분원 복합소재기술연구소, Korea
With increasing demand for sustainable and renewable power sources in modern electronic industries, supercapacitors have attracted tremendous attention because of their high power density, excellent pulse charge-discharge characteristics, long cycling life and safe operation. Up to now, various materials, including carbonaceous materials, conducting polymers, transition metal oxides/hydroxides, and hybrid composite, have been widely investigated as electrodes for supercapacitors. Graphene is an excellent substrate to host active nanomaterials for energy applications due to its high conductivity, large surface area, flexibility, and chemical stability. Among the transition metal oxides, manganese oxides is regarded as a promising electrode material for supercapacitors due to its environmental compatibility, low cost and abundant availability. Therefore, the combination of Manganese oxide and graphene seems to be a promising attempt to achieve a possible synergic effect to improve the performances of graphene-based supercapacitors. Herein, we simply synthesized reduced Graphene oxide/ manganese oxide nanocomposite by a controlled thermal decomposition of metal oxalates with regular morphologies for high-power supercapacitor electrodes. The electrochemical properties of the composites as potential electrode materials for supercapacitors were investigated using different electrochemical techniques including cyclic voltammetry (CV), galvanostatic charge?discharge. The reduced Graphene oxide/ manganese oxide nanocomposite were used as a supercapacitor electrode. The specific capacitance in a three-electrode system was 2460 F/g at a current density of 1 A/g with capacitance retention of 95% after 3000 cycles.